Coal hopper structure under coal mill

Abstract

The utility model discloses a coal mill lower coal coal bucket structure, including the hopper body, the inside of hopper body is provided with the plugging subassembly, and this plugging subassembly includes the plugging piece, the closure and the limiting piece, the middle part of plugging piece is vertically arranged in the inside of hopper body, and the top of plugging piece extends horizontally to the side of hopper body, and the bottom of plugging piece is in the outside of hopper body and extends horizontally to the other side of hopper body, the closure is arranged to one side of plugging piece middle position, and the closure rotates around its own axis under the lifting movement of plugging piece, in the utility model, the plugging subassembly that adds in the inside of hopper body realizes the purpose of quick plugging, namely when encountering emergency situation, such as equipment sudden failure, fire and the like need to stop coal supply immediately, the plugging subassembly can realize the tight plugging of lower coal coal bucket in very short time, avoids the continuous drop of coal dust particle, thereby effectively prevents the waste of coal resources and the environmental pollution caused by coal dust scattering.

Description

Technical Field

[0001] This utility model belongs to the field of coal mill technology, specifically relating to a coal hopper structure for a coal mill. Background Technology

[0002] In the complex operating system of a power plant, the coal mill is one of the most crucial core pieces of equipment in the coal-fired power generation process. It undertakes the key task of grinding raw coal into fine powder. After being powerfully ground by the coal mill, the raw coal is crushed into coal powder particles that meet the combustion requirements, thereby increasing the contact area between the coal and air. This ensures that the coal can burn more fully and efficiently in the boiler, releasing a large amount of heat energy to heat water and generate steam to drive the turbine to generate electricity. The coal hopper at the bottom of the coal mill is where the crushed coal powder particles are output in an orderly manner and stored for later use.

[0003] In the current actual operation of power plants, the coal hopper of the coal mill does not have the key function of temporary sealing. When encountering sudden unexpected situations, such as equipment failure requiring emergency shutdown for maintenance, coal dust particles will fall uncontrollably and continuously. This will not only cause a large amount of coal dust to be scattered in the surrounding environment, resulting in the needless waste of coal resources, but also cause dust pollution, which will threaten the health of on-site workers and affect the overall environmental hygiene of the power plant.

[0004] Furthermore, during normal coal discharge, if the coal dust particles enter the coal hopper at too high a speed, the rapidly flowing coal dust will create a violent swirling airflow inside the hopper, generating a large amount of dust. This dust will fly and swirl freely inside the hopper, potentially affecting the uniformity and stability of coal discharge and adversely interfering with the normal operation of the coal mill. Utility Model Content

[0005] The purpose of this utility model is to provide a coal hopper structure for a coal mill, so as to solve the problems mentioned in the background art, such as the inability to temporarily seal the coal hopper of a power plant, the rapid discharge of materials causing dust, and the resulting pollution and waste.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a coal hopper structure for a coal mill, comprising a hopper body, wherein a sealing assembly is provided inside the hopper body, the sealing assembly comprising a sealing element, a closing element, and a limiting element;

[0007] The middle part of the sealing member is vertically set inside the bucket body, while the top of the sealing member extends horizontally towards one side of the bucket body, and the bottom of the sealing member is outside the bucket body and extends horizontally towards the other side of the bucket body.

[0008] The closing element is located on one side of the middle position of the sealing element, and the closing element rotates around its own axis under the lifting and lowering movement of the sealing element;

[0009] The limiting component is located below the bucket body and supports and limits the bottom of the sealing component.

[0010] Preferably, the hopper has an inlet on its side and a outlet at its bottom;

[0011] The sealing component includes a sealing plate, an end plate, and a rotating shaft;

[0012] The sealing plate has a discharge port in the middle, and the top of the sealing plate extends horizontally towards the discharge port by bending.

[0013] The end plate is the bottom area of ​​the sealing component and is integrally fixed to the bottom of the sealing plate. The end plate overlaps the limiting component.

[0014] The rotating shaft is located on the side near the top of the sealing plate, and it is rotatably connected to the closure element.

[0015] Preferably, the closure element includes a rotating plate and a guide plate;

[0016] A shaft runs through the middle of the rotating plate, with both ends of the shaft fixed inside the bucket body, and the top of the rotating plate is rotatably connected to the rotating shaft.

[0017] The guide plate is fixed to the inner wall of the hopper and located below the feed inlet. The guide plate is inclined and overlaps and closes with the rotating plate after rotation.

[0018] Preferably, the inner wall of the bucket is further fixed with a feeding plate, which is fixed to the inner wall of both sides of the bucket along with the guide plate. The bottom of the feeding plate is aligned and connected to the feeding port on the rotating shaft in the rising state.

[0019] Preferably, a plurality of limiting posts are fixedly provided at the bottom end of the discharge port, and each limiting post is provided with a through hole, and the limiting member is connected to the through hole.

[0020] Preferably, the limiting component includes a connecting plate and a plug rod;

[0021] The number of insertion rods and limiting posts are equal, and the insertion rods pass through the through holes of the limiting posts, while the connecting plate is fixed to one end of the insertion rods.

[0022] Preferably, the bottom area of ​​the hopper is constricted, and the circumference of the discharge port is smaller than the circumference of the hopper.

[0023] Compared with the prior art, the beneficial effects of this utility model are:

[0024] In this invention, a sealing component added inside the hopper achieves rapid sealing. In emergency situations, such as sudden equipment failure or fire requiring immediate cessation of coal supply, this sealing component can tightly seal the coal hopper in a very short time, preventing the continuous falling of coal dust particles. This effectively prevents waste of coal resources and environmental pollution caused by coal dust scattering. During normal production and when sealing is not required, the sealing component functions as a diversion device, cleverly diverting the coal dust particles entering the hopper to ensure uniform distribution. This significantly reduces the swirling airflow caused by concentrated coal dust inflow, minimizing dust generation. This extends the service life of the equipment inside the hopper and ensures the stability and uniformity of material feeding. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a bottom view of the present invention;

[0027] Figure 3 This utility model Figure 2 Enlarged view of region A in the middle;

[0028] Figure 4 This is a cross-sectional view of the present invention.

[0029] In the picture:

[0030] 100. Bucket body; 101. Feed inlet; 102. Discharge outlet; 103. Limiting post; 104. Guide plate; 105. Discharge plate;

[0031] 200. Sealing plate; 201. End plate; 202. Discharge port; 203. Rotating shaft; 204. Rotating plate;

[0032] 300. Connecting plate; 301. Insert rod. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1 to 4 This utility model provides a technical solution: a coal hopper structure for a coal mill, including a hopper body 100, and a sealing component is provided inside the hopper body 100. The sealing component includes a sealing element, a closing element, and a limiting element.

[0035] The middle part of the sealing member is vertically set inside the bucket body 100, while the top of the sealing member extends horizontally towards one side of the bucket body 100, and the bottom of the sealing member is outside the bucket body 100 and extends horizontally towards the other side of the bucket body 100.

[0036] The closing element is located on one side of the middle position of the sealing element. The closing element rotates around its own axis as the sealing element moves up and down.

[0037] The limiting component is located below the bucket body 100 and supports the bottom of the sealing component.

[0038] In this embodiment, preferably, the side of the hopper 100 is provided with an inlet 101, and the bottom of the hopper 100 is provided with a discharge outlet 102.

[0039] The sealing components include a sealing plate 200, an end plate 201, and a rotating shaft 203;

[0040] A discharge port 202 is provided in the middle of the sealing plate 200, and the top of the sealing plate 200 extends horizontally towards the inlet 101 by bending.

[0041] The end plate 201 is the bottom area of ​​the sealing component and is integrally fixed to the bottom of the sealing plate 200. The end plate 201 overlaps the limiting component.

[0042] The rotating shaft 203 is located on the side near the top of the sealing plate 200, and the rotating shaft 203 is rotatably connected to the closure element.

[0043] In this embodiment, preferably, the closing element includes a rotating plate 204 and a guide plate 104;

[0044] A shaft runs through the middle of the rotating plate 204, with both ends of the shaft fixed inside the bucket body 100. The top of the rotating plate 204 is rotatably connected to the rotating shaft 203.

[0045] The guide plate 104 is fixed on the inner wall of the hopper 100 and located below the feed inlet 101. The guide plate 104 is inclined and overlaps and closes with the rotating plate 204 after rotation.

[0046] In this embodiment, preferably, the inner wall of the bucket body 100 is also fixed with a feeding plate 105. The feeding plate 105 and the guide plate 104 are respectively fixed on the inner walls of the two sides of the bucket body 100. The bottom of the feeding plate 105 is aligned and connected with the feeding port 202 on the rotating shaft 203 in the rising state.

[0047] In this embodiment, preferably, a plurality of limiting posts 103 are fixedly provided at the bottom end of the discharge port 102, and each limiting post 103 is provided with a through hole, and the limiting member is connected to the through hole.

[0048] In this embodiment, preferably, the limiting component includes a connecting plate 300 and a plug rod 301;

[0049] The number of insertion rods 301 and the number of limiting posts 103 are equal, and the insertion rods 301 pass through the through holes of the limiting posts 103, while the connecting plate 300 is fixed to one end of the insertion rods 301.

[0050] In this embodiment, preferably, the bottom area of ​​the hopper 100 is constricted, and the circumference of the discharge port 102 is smaller than the circumference of the hopper 100.

[0051] The working principle of this coal hopper structure is explained below:

[0052] Reference Figure 4 Pulverized coal particles enter through inlet 101. At this point, the particles are divided into two sections by the horizontal area at the top of the sealing plate 200. Figure 4 As indicated by the two opposing arrows, the coal powder particles are discharged from the gap between the rotating plate 204 and the guide plate 104, and the other part is discharged from the gap between the discharge plate 105 and the discharge port 202. Finally, the coal powder particles in both areas are discharged from the discharge port 102. When sealing is required, the connecting plate 300 is pulled away. At this time, the sealing plate 200 and the end plate 201 descend under gravity, thereby driving one end of the rotating plate 204 to rotate through the rotating shaft 203, and causing the other end of the rotating plate 204 to rotate upward, closing the gap between the rotating plate 204 and the guide plate 104, thus achieving sealing. The discharge port 202 also moves down to below the discharge plate 105, thus completely sealing the inside of the bucket body 100.

[0053] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A coal hopper structure for a coal mill, comprising a hopper body (100), characterized in that: The hopper (100) is provided with a sealing assembly inside, which includes a sealing element, a closing element and a limiting element; The middle part of the sealing member is vertically set inside the bucket body (100), while the top of the sealing member extends horizontally towards one side of the bucket body (100), and the bottom of the sealing member is outside the bucket body (100) and extends horizontally towards the other side of the bucket body (100). The closing element is located on one side of the middle position of the sealing element, and the closing element rotates around its own axis under the lifting and lowering movement of the sealing element; The limiting component is located below the bucket body (100) and supports the bottom of the sealing component.

2. The coal hopper structure for a coal mill according to claim 1, characterized in that: The hopper (100) has an inlet (101) on its side and a outlet (102) at its bottom. The sealing component includes a sealing plate (200), an end plate (201), and a rotating shaft (203); The sealing plate (200) has a discharge port (202) in the middle, and the top of the sealing plate (200) extends horizontally toward the inlet (101) by bending. The end plate (201) is the bottom area of ​​the sealing component and is integrally fixed to the bottom of the sealing plate (200). The end plate (201) overlaps the limiting component. The rotating shaft (203) is located on the side near the top of the sealing plate (200), and the rotating shaft (203) is rotatably connected to the closure member.

3. The coal hopper structure for a coal mill according to claim 2, characterized in that: The closing element includes a rotating plate (204) and a guide plate (104); A shaft runs through the middle of the rotating plate (204), and the two ends of the shaft are fixed inside the bucket body (100). The top of the rotating plate (204) is rotatably connected to the rotating shaft (203). The guide plate (104) is fixed on the inner wall of the bucket body (100) and located below the feed inlet (101). The guide plate (104) is inclined and overlaps and closes with the rotating plate (204) after rotation.

4. The coal hopper structure for a coal mill according to claim 3, characterized in that: The inner wall of the bucket (100) is also fixed with a feeding plate (105), which is fixed to the inner walls of the two sides of the bucket (100) along with the guide plate (104). The bottom of the feeding plate (105) is aligned and connected with the feeding port (202) on the rotating shaft (203) in the rising state.

5. The coal hopper structure for a coal mill according to claim 2, characterized in that: The bottom end of the discharge port (102) is fixed with a plurality of limiting posts (103), each of the limiting posts (103) having a through hole, and the limiting member is connected to the through hole.

6. The coal hopper structure for a coal mill according to claim 5, characterized in that: The limiting component includes a connecting plate (300) and a plug rod (301); The number of the insert rods (301) and the limiting post (103) are equal, and the insert rods (301) pass through the through holes of the limiting post (103), while the connecting plate (300) is fixed to one end of the insert rods (301).

7. The coal hopper structure for a coal mill according to claim 2, characterized in that: The bottom area of ​​the bucket (100) is constricted, and the circumference of the discharge port (102) is smaller than the circumference of the bucket (100).

Images